1. No.
2. Yes, but no longer transferable to miles/hotel-points from the Sapphire non-preferred card.
3. No. (FYI, it usually posts on SP cardholders February statement, not 1/1)
4. I don't think the Sapphire non-preferred is a
WMC(/V
S), but I'm not sure about this one.
5. Yes.
Answers to most of your questions are listed on
this Chase webpage.